RESEARCH ARTICLE


Modelling Mechanical Response of Geological Fault Structures and their Interaction Analysis with Surrounding Rock



Zhang Yuting*, 1, Ding Xiuli1, Pei Qitao1, Zhang Zhiguo2
1 Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan, 430010, China
2 Changjiang Survey, Planning, Design and Research Co.,Ltd, Wuhan, 430010, China


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Creative Commons License
© 2015 Yuting et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute Huangpu Street #269, Jiangan District, Wuhan, Hubei Province, China; Tel: 0086 013971212124; Fax: 0086-027-82926540; E-mail: magicdonkey@163.com


Abstract

The mechanical response of geological fault structure and its interaction with surrounding rock are crucial for the stability of caverns in hard rocks. Geological fault structure exhibits unique mechanical response subjected to rock excavation. Potential failure patterns and their corresponding criterions of geological faults, including open failure, slip failure and block instability, are summarized. Corresponding numerical models and proper supporting measures are recommended for open and slip failures, respectively. Rock damage model is adopted to better illustrate the interaction of rockmass and geological faults. Safety factor for anti-sliding is introduced to quantify the safety extent of caverns subjected to open and slip failures caused by geological faults. Case study shows that the presented methods are effective to describe the mechanical response of geological faults and also to provide quantitative references for reinforcement design of rock caverns.

Keywords: Geological fault structure, interaction, mechanical response, numerical analysis.